GB482219A - Manufacture of polyvinyl acetals - Google Patents

Manufacture of polyvinyl acetals

Info

Publication number
GB482219A
GB482219A GB26770/36A GB2677036A GB482219A GB 482219 A GB482219 A GB 482219A GB 26770/36 A GB26770/36 A GB 26770/36A GB 2677036 A GB2677036 A GB 2677036A GB 482219 A GB482219 A GB 482219A
Authority
GB
United Kingdom
Prior art keywords
polyvinyl
alcohol
acid
acetaldehyde
octyraldehyde
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB26770/36A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DEI55998D priority Critical patent/DE731684C/en
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB26770/36A priority patent/GB482219A/en
Priority to FR827054D priority patent/FR827054A/en
Priority to US164756A priority patent/US2158311A/en
Publication of GB482219A publication Critical patent/GB482219A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F8/00—Chemical modification by after-treatment
    • C08F8/28—Condensation with aldehydes or ketones

Abstract

Polyvinyl acetals are manufactured by acting on an aqueous emulsion of a polyvinyl ester containing a polyvinyl alcohol or a water-soluble derivative thereof as emulsifying agent, in the presence of a mineral acid or a strong organic acid, with a quantity of a carbonyl compound sufficient to convert at least part of the polyvinyl ester to a polyvinyl acetal. Specified materials are: water-soluble derivatives of polyvinyl alcohol-polyvinyl alcohols partly esterified with an organic acid, e.g. acetic, propionic, or butyric acid, or partly acetalized with an aldehyde, e.g. formaldehyde, acetaldehyde, butyraldehyde, octyraldehyde, or. benzaldehyde; polyvinyl esters-the formate, acetate, propionate, and butyrate; acid catalysts-mineral acids, e.g. sulphuric, hydrochloric, nitric, phosphoric, hydrofluoboric acids, and strong sulphonic acids, e.g. toluene sulphonic acids; carbonyl compounds-formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, octyraldehyde, benzaldehyde, cyclohexanone and methylcyclohexanone. There may also be present an alcohol, e.g. methyl, ethyl or propyl alcohol. In examples (1), (2), (4), an emulsion of polyvinyl acetate in aqueous polyvinyl alcohol is acetalized by acetaldehyde in the presence of methyl alcohol and sulphuric acid, by butyraldehyde in the presence of ethyl alcohol and p-toluene sulphonic acid, or by octyraldehyde in the presence of ethyl alcohol and phosphoric acid; (3) an emulsion of polyvinyl butyrate in aqueous-alcoholic polyvinyl alcohol is acetalized by acetaldehyde in the presence of methyl alcohol and hydrochloric acid. The product of example 2 may be worked up as threads. Specifications 466,173 and 469,319 are referred to.
GB26770/36A 1936-09-24 1936-10-02 Manufacture of polyvinyl acetals Expired GB482219A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DEI55998D DE731684C (en) 1936-09-24 1936-09-24 Process for the preparation of polyvinyl acetals
GB26770/36A GB482219A (en) 1936-09-24 1936-10-02 Manufacture of polyvinyl acetals
FR827054D FR827054A (en) 1936-09-24 1937-09-23 Process for the preparation of polymerization products
US164756A US2158311A (en) 1936-09-24 1937-09-29 Process of preparing polymeric products

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEI55998D DE731684C (en) 1936-09-24 1936-09-24 Process for the preparation of polyvinyl acetals
GB26770/36A GB482219A (en) 1936-09-24 1936-10-02 Manufacture of polyvinyl acetals

Publications (1)

Publication Number Publication Date
GB482219A true GB482219A (en) 1938-03-25

Family

ID=25981958

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26770/36A Expired GB482219A (en) 1936-09-24 1936-10-02 Manufacture of polyvinyl acetals

Country Status (4)

Country Link
US (1) US2158311A (en)
DE (1) DE731684C (en)
FR (1) FR827054A (en)
GB (1) GB482219A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434313A (en) * 1943-05-25 1948-01-13 Bonard Claude Manufacture of compounds containing carbonyl groups
US4385155A (en) * 1981-12-02 1983-05-24 W. R. Grace & Co. Method of preparing crosslinked poly(vinyl alcohol)

Also Published As

Publication number Publication date
FR827054A (en) 1938-04-15
US2158311A (en) 1939-05-16
DE731684C (en) 1943-02-15

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